Integration of capacitive pressure sensor-on-chip with lead-free perovskite solar cells for continuous health monitoring (original) (raw)

Abdellatif, Sameh O., Moustafa, Afaf, Khalid, Ahmed and Ghannam, Rami ORCID: https://orcid.org/0000-0001-6910-9280(2023) Integration of capacitive pressure sensor-on-chip with lead-free perovskite solar cells for continuous health monitoring.Micromachines, 14(9), 1676. (doi: 10.3390/mi14091676) (PMID:37763839) (PMCID:PMC10536692)

Abstract

The increasing prevalence of hypertension necessitates continuous blood pressure monitoring. This can be safely and painlessly achieved using non-invasive wearable electronic devices. However, the integration of analog, digital, and power electronics into a single system poses significant challenges. Therefore, we demonstrated a comprehensive multi-scale simulation of a sensor-on-chip that was based on a capacitive pressure sensor. Two analog interfacing circuits were proposed for a full-scale operation ranging from 0 V to 5 V, enabling efficient digital data processing. We also demonstrated the integration of lead-free perovskite solar cells as a mechanism for self-powering the sensor. The proposed system exhibits varying sensitivity from 1.4 × 10−3 to 0.095 (kPa)−1, depending on the pressure range of measurement. In the most optimal configuration, the system consumed 50.5 mW, encompassing a 6.487 mm2 area for the perovskite cell and a CMOS layout area of 1.78 × 1.232 mm2. These results underline the potential for such sensor-on-chip designs in future wearable health-monitoring technologies. Overall, this paper contributes to the field of wearable health-monitoring technologies by presenting a novel approach to self-powered blood pressure monitoring through the integration of capacitive pressure sensors, analog interfacing circuits, and lead-free perovskite solar cells.

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